In leagal terms, the concession as a licence to carry out some activities on special authorization, and the concession bilateral legal relations, wich means that they always develop between the two parties, ie between the concession grantor and the concessionaire. There are three types of concessions: concession for the public services, concession for public works and concessin for the economic use of common or other goods. The Croatian law is needed before granting concessions preparatory actions, and preparatory work in particular: the appointment of the expert commission for concessions, making a concession justification study or analysis of the concession award, estimated value of the concession, and preparing tender documents. To devised concession relationship, it is necesary, in addition to the decision on the concession contract on concession outlining the rights and obligations of the concession provider and concessionaire. The concession grantor shall continuously monitor the operation of the concessionaire and the execution of its obligations under the concession agreement. In Croatia, with the Concessions Act, apply the Law of Maritime Domain and Seaport and other regulations.